Henry thompson



@prima tatw @anni @f fitr.

IMPROVED WINDLASS FOR VESSELS.

@be Stigrhrle einen tn in tiges; trtta's nttut nnb marking @mit nt tigerune.

'IO ALL PERSONS TO WHOM THESE PRESENTS SHALL COMES Be it` known that I,HENRY THOMPSON, ofiRockland, in the county of Knox, and State of Maine,have made a new and useful invention, having reference to the Windlassof 'a Navigablc Vessel; and I do hereby declare the same to be fullydescribed in the followingspecitication, and represented in theaccompanying drawings, of which- Figure 1 is a top view of a windlassprovided with my invention',

Figure 2 is a front elevation, and

Figure 3 a side elevation of my mechanism, which is applied to thewindlass to prevent fleeting otits chain cable, or the riding' of onecoil while being formed upon the next one, a m'atter whichit is verydesirable to avoid, as is well understood by mariners, seriousconsequences being liable te result from such an accident or occurrence.

In the drawings, A denotes an ordinary windlass, supported on bitsrl B,and provided not only with mechanism for revolving it, but with aratchet, a, and a pawl, I1, for preventing it from turning backwardunder the draught on the cable H. This mechanism is of' a kind wellknown and in common use, it consisting of two ratehets, each of which isixed to the windlass, and enclosed in one ot' two paul-euses C C, whichembrace and turn on vthe windlass, and carry pwls to act on theratehets. These pawl-eascs are connected by rods to a brake or lever, D,which, on being vibrated on its fulcrnm, will impart a reciprocatingmotion to each pawl-case, one being moved in one direction while theother is in the act of being moved in the opposite direction. In frontof the windlass, and hinged to the deck E, is a standard, F, carrying aroller, c, and being connected with one of the pawl-cases hy means of abar, d. Such barlis to be jointed tothe case and standard in such manneras to cause the pawl-case, during its movements, to impart to thestandard and its roller vibratory movements, such as will force theratchet against and away from the next adjacent coil of the cable on thewindlass, the object being to crowd the coil aside a little, or to suchextent as to prevent the new coil, while being laid, from overridingthat so pushed aside. In order to prevent the standard from beingpressed away from the windlass there is jointed to the former aud-thedeel: a stay-bar, G, (see iig. 3,) which, though connected with thedeck, and arranged in manner as represented, moves with Ithe standard.

I make no claim to the mechanism for revolving the windlass, as such ash'ereinbefore mentioned is well known and in common use. What I do claimas my invention, is-

The arrangement as well as the combination of the vibratory standard Fand its roller c, or the equivalent thereof, with the windluss A and oneof its pawl-cases C C, so as to be operated by such p awl-case,substantially in the manner and for the purpose as hcrelinbef'orespecified.

I also claim the combination and arrangement of the vibratory standardF, its roller e, or the equivalent thereof, the staylG, and theeonnection-bar d, as described, the whole to be applied to the decl: andwindlass of a vessel and the pawl-case of such windlass, substantiallyas and for the purpose hcreinbei'ore explained.

HENRY THOMPSON.

Witnesses:

R. H. EDDY, F. I. HALE, Jr.

